Cells are the smallest unit of life. Cells in multicellular plants and animals are arranged into tissues, organs and organ systems. Cells. Tissues. Organs. Organ systems. And the organism itself.

This observation is explained by another key feature of stem cells that is shared between plants and animals, as explained below. The ability of stem cells to constantly generate new tissues has ...

There are more than 100 wild animal species unique to China including ... China is also one of the countries with the most abundant plant life in the world. There are more than 32,000 species ...

Likewise, there are no fossils of complex land animals or plants before the Cambrian era ... Ozone production depends on atmospheric oxygen and background UVR. It has been widely accepted by ...

Relocation to a new site is a usual part of the life cycle of many plants and animals and is viewed as an adaptive trait in life history. Active and Passive Dispersal Individuals can disperse ...

“These plants and animals can never be brought back. We absolutely must do everything we can to avert the loss of even more threads in our web of life.” In a single bright spot, the agency retained ...

Life (as far as we know) started in water and is still very much dependent upon it. Find out about the animals and plants that rely on ponds, the history and key features of this habitat, and why we ...